This flash program is a way to give your students endless practice on solving simple linear inequalities. It randomly generates ten problems which you can print and distribute. An answer sheet is al...More: lessons, discussions, ratings, reviews,...

Graphically determine the value of 2 given fractions represented as points on a number line then graphically find a fraction whose value is inbetween the value of the 2 given fractions and determin...More: lessons, discussions, ratings, reviews,...

Graphically determine the value of 2 given fractions represented as points on a number line then graphically find a fraction whose value is inbetween the value of the 2 given fractions and determin...More: lessons, discussions, ratings, reviews,...

Box plots are used to summarize data graphically. To construct a box plot, first find the minimum data value, the lower quartile, the median, the upper quartile, and the maximum data value. These five...More: lessons, discussions, ratings, reviews,...

The Box and Whisker Plot lesson includes visuals and audio narration. A virtual manipulative lets users enter and modify a data set and see the box plot update in real time. A question set can be us...More: lessons, discussions, ratings, reviews,...

Make an open-top box from a sheet of paper by cutting squares out of the corners. See how the volume of the box changes as the sides of the squares change. The link to the tool itself downloads the ...More: lessons, discussions, ratings, reviews,...

Brain Boggle Chembalancer is the enrichment version of Chembalancer, an online game that teaches balancing chemical equations by inspection. If you think of the elements or groups of elements as ...More: lessons, discussions, ratings, reviews,...

A Cabri *.fig file written to illustrate Brianchon's First Theorem which can be stated, "If AB, CD, and EF are concurrent at X, and BC, DE, and FA are concurrent at Y, then AD, BE, and CF are concurre...More: lessons, discussions, ratings, reviews,...

Student page for the classroom activity (also called the Masonry Problem; a variation on polyominoes) to be explored through manipulatives (dominoes). Students explore different possibilities of makin...More: lessons, discussions, ratings, reviews,...

Classroom activity (also called the Masonry Problem; a variation on polyominoes) to be explored through manipulatives (dominoes). Students explore different possibilities of making brick walls with an...More: lessons, discussions, ratings, reviews,...

This material is based upon work supported by the
National Science Foundation under Grant DUE-0226284.
Any opinions, findings, and conclusions or recommendations
expressed in this material are those of the author(s)
and do not necessarily reflect the views of the
National Science Foundation.